薄透镜焦距测定实验中像屏的改进

The Improvement of Image Plate in the Experiment of Determining the Thin Focal Length of Lens

将以往纯白像屏改进为带有刻度尺的白像屏 ,可方便调节光学系统的共轴等高 ,缩短调整时间 ,使实验测定精度提高 ,误差减小 。

Improving the pure white image plate into the one with dividing ruler,we can adjust the coaxial equal altitude of the optical system,shorten the adjusting time,improve the determination accuracy in the experiment,reduce error and promote the experimental efficiency.